shots of H2agonist (4-methylhistamine) and antagonists (cimetidine and ranitidine) enhanced the discomfort threshold.[14] In another scholarly research, it was discovered that intracerebral microinjection of temelastine (H1-receptor antagonist) and cimetidine in to the preaquductal grey or in to the raphe nucleus prevented the histamine-induced antinociception.[24] Furthermore, subcutaneous (s.c.) shots of mepyramine (H1-receptor antagonist) and zolantidine (H2-receptor […]